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多项选择题

压实机械根据压实原理的不同可分为（）。

A.冲击式
B.碾压式
C.脉冲式
D.振动压实式
E.内燃式

问答题

Fill in the appropriate word or words from the following list.
have no choice              match                   cannot help
lodged a claim              misjudge                compensate
attributed                embarrassing           are apt
is unsuited
6．By______a customer unnecessarily, you may get his payment now. But you may lose his business in the future.